Grate section



.may s. 1924.

W. F. BRADLEY ET AL GRATE SECTION Filed Nov. l5 1923 @ai i 1i f J d l! wfd Patented July 8, 1924.

WILLIAM F. BRADLEY AND JOHN W. vHIJ'LSN, 0F KEOKUK, IOWA, .ASSIGTORS` TO HULSN GRATE COMlANY, 0F KEOKUK, IOWA.

ennrn SECTION..

Application led November 15, 1923. Serial No. 674,940.

'To all whom t may concern.'

descriptionof the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Our invention relates to improvements 1n furnace grates and has reference more particularly to the so-called finger bars, that is rocking bars provided with a plurality of firesupporting fingers. These fingers are usually made detachable from the ba'rs 1n order thatany or all of them may be renewed from time to time, and while we are aware that numerous structures have been provided permitting easy attachment and detachment of the fingers with respect to the bars, it is the object of our invention to provide an exceptionally simple and easily operable construction, necessitating that the fingers shall be inclined with respect to the longitudinal axis of the bar, before they can be removed, and hence, as the fingers when in use have no tendency to assume such an inclined position, there is no danger of disconnection thereof from the bars.

With the foregoing in view, the invention resides n the novel subject matter hereinafter described and claimed, the description being supplemented by the accompanying drawing.

Figures 1 and 2 are fragmentary elevations of opposite sides of 'a finger bar constructed in accordance with our invention.

Figure 3 is a fragmentary plan view.

Figure 4 is a fragmentary side elevation illustrating the manner of applying and removing the ngers.

Figure 5 is a transverse sectional view on line 5,-5 of Fig. 1.

Figure 6 is a similar view on line 6-6 of Fig. 4. V

Figure 7 is a sectional perspective view of a portion of the bar which carries the removable fingers. 1

Figure8 is a detail horizontal sectional view on line 8-8 of Fig. 7.

In the drawings above briefly' described, the numeral 1 designates a metal bar adapted in most instances to be rockably mounted,

' said bar preferably having oppositel flat sides 2 and 3, disposed in vertical planes. The side 2 is formed near`itsr`upper edge, with angintegral longitudinal rib 4 which extends uninterruptedly from one end of the bar to the other. The side 3 is formed at one or more points throughout its length with a shallow recess 5 which is inclined with respect to the longitudinal axis of the bar and opens through the upper edge of the latter, said recess extending into the bar a distance substantially the same as the horizontal dimension of the rib 4, that is, the transverse horizontal dimension of said rib. At the upper end of the recess 5, the edge of the bar 1 is preferably formed with an angular notch 6 for` a purpose to appear.

A plurality of fingers 7 are providedl for application to the bar 1, and as the construction of all of these fingers is identical, only one will be described. This finger is provided with a pair of depending legs 8 and 9 which are adapted to .straddle the bar 1, said legs being spaced apart a distance equivalent to the transverse horizontal dimension of the bar 1, exclusive of the rib 4. The inner side of the leg 8 is formed with a transverse groove l() adapted to receive the rib 4, but engageable therewith and disengageable therefrom, only when the other leg 9 is received in the shallow recess 5, as seen in Figs. 4 and 6. The edge walls of this recess 5, are preferably beveled to some extent, as indicated at 11, and when the finger 7 is engaged with the bar 1 as disclosed in Fig. 6, and is then righted, the arm 9`rides out across one of the beveled surfaces and at the same time, the groove'lO engages the rib 4. Then, the finger may be slid in either direction upon the bar l and will be held upon the latter by engagement of the groove and rib.` Thus, any desired number of the fingers may be applied to the bar and it is only necessary that slight spaces be left between the adjacent fingers, sufficient to permit, them to be moved away from the 5 and disengage from the rib 4, yet this operation may be easily performed by hand. f Excellent results have been obtained from the details disclosed and they are therefore preferably Y followed, but within the scopeof the invention as claimed, numerous minor changes may be made.

Weclaim:

1. grate section comprising a bar having a longitudinal rib on one vertical' side andga 'shallow recess in its opposite vertical side, said recess being inclined with respect to the axis` of said bar and opening through the upper edge of said bar, and a transverse finger member having a pair of depending legs adapted to straddle said bar, said legs being spaced apart a distance substantially equal to the horizontal distance between said sides of the bar exclusive of said rib, the inner side of one leg having a transverse groove to receive the aforesaid rib, the other leg being of a width for reception in the aforesaid shallow recess when the finger is inclined with respect to the axis of the bar, said recess extending horizontally into the bar a sufficient distance to permit said first leg to clear said rib when said other leg is in said recess. u

2. A structure as specified in claim l; the upper edge of said bar being notched at the upper end of said shallow recess to receive an edge of said finger when tilted. In testimony whereof we have hereunto affixed our signatures.

WILLIAM F. BRADLEY. JOHN W. HULSON 

